difference between npn and pnp transistor pdf

Difference Between Npn And Pnp Transistor Pdf

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The arrangement of the three terminals affects the current and the amplification of the transistor. The behavior of Bipolar junction transistors is also very different for each circuit configuration. The three different circuit configurations produce different circuit characteristics with regards to input impedance, output impedance and gain. These characteristics affect whether the transistor exhibits voltage gain, current gain or power gain. One of the primary operations of a bipolar junction transistor is to amplify the signal of the current.

Difference Between NPN and PNP Transistor

Both p-n- p and the n- p-n transistors are the basic transistors which come under the category of bipolar junction transistors. These are used in the various amplifications circuits and the modulating circuits. NPN and PNP transistors are bipolar junction transistors, and it is a basic electrical and electronic component which is used to build many electrical and electronic projects. The operation of these transistors involves both electrons and holes. In PNP transistors, majority charge carriers are holes, whereas in NPN transistors, electrons are the majority charge carriers. The formation of these transistors is based on the diodes with the junction p-n.

As example, the amplifier PNP silicon bipolar transistor BC can work with collector currents up to mA maximum ratings and up to 45V.. In some applications this transistor can be used as switch for higher currents, e. Digital Transistor PNP. Darlington PNP Transistors. Is this transistor in a TO3 case?

These transistors can be used as amplifiers, switches and oscillators. Except, FETs have only one sort of charge carrier. In NPN transistor, the flow of current runs from the collector terminal to the emitter terminal. A PNP transistor switches ON, when there is no flow of current at the base terminal of the transistor. In PNP transistor, the flow of current runs from the emitter terminal to the collector terminal. In this kind of transistor, the majority charge carriers are holes. Mainly, this transistor works as the same as the NPN transistor.

Differences between NPN & PNP Transistors and their Making

BJTs are made of doped materials and allow current amplification. NPN transistor is powered on when enough current is supplied from the transistor base to the emitter. Thus, the NPN transistor base has to be connected to a positive voltage and the emitter connected to negative voltage for current to flow into the base. When enough current is flowing from the base into the emitter, the transistor switches on directing current flow from collector to the emitter instead of the transistor base to the emitter. The PNP transistor works in the opposite. In PNP transistor, current normally flows from the transistor's emitter to the base, and when enough current flows from emitter to the base the transistor turns on directing current from emitter to collector.

Bipolar Junction Transistor

One of the major difference between the NPN and PNP transistor is that in the NPN transistor the current flow between collector to emitter when the positive supply is given to the base, whereas in PNP transistor the charge carrier flows from the emitter to collector when negative supply is given to the base. It is the current controlling devices and mainly used for switching and amplifying the signal. Mostly, the NPN transistor is used in the circuit because in NPN transistor the conduction current is mainly by electrons while in the PNP transistor the conduction current is because of the holes. As the electrons are more mobile the NPN has high conduction.

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By StudentsHeart Team. On August 4, In Transistor. In PNP, arrow points inside. This was the main difference between NPN and PNP transistor, in order to understand the physical and internal differences of both types of transistor we have to see their Symbols, Construction, and Operation. Here you can see that an NPN and PNP transistor has three terminals knows as Emitter, Base, and Collector the only difference in symbols of both transistor is the direction of an arrow.

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Another crucial difference between NPN and PNP transistor is the direction of flow of current, the current in NPN transistor flows from collector to emitter , on the contrary, the current in PNP transistor flows from emitter to collector. The emitter terminal of NPN transistor is connected to negative terminal of the battery while the emitter terminal of PNP transistor is connected to the positive terminal of the battery. NPN transistor is formed by sandwiching P-layer of the semiconductor between two layers of N-type semiconductor. The majority charge carriers in NPN transistor are electrons. In this emitter junction is connected to the negative terminal of the battery while the base of the transistor is connected to the positive terminal of the battery.

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Difference between NPN and PNP Transistor

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Difference Between NPN & PNP Transistor

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2 Comments

  1. Vignette C.

    a positive voltage is given to the collector terminal to produce a current flow from the collector to the emitter.

    24.04.2021 at 20:38 Reply
  2. TeГіcrito B.

    I too had a love story free pdf the racket matt kennard pdf

    28.04.2021 at 16:51 Reply

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